I agree with the other pup. I would take her to the vet because she is too young to be loosing teeth

Member 1116541
answered on 1/19/13.
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At 11 weeks, the bigger molars are erupting thru the gums. If she was chewing on a toy, most likely the pressure caused the tooth to tear the gum slightly as it pressed on it... perfectly normal.
This is why teething is painful...those teeth need to actually break thru the gums, which DOES result in bleeding/pain.